E36 325is questions for IT/S or /R classifications

[jennings27]

GCR page 335: (Engines) Hardware items (nuts, bolts, etc.) may be replaced with similar items performing the same fastening function(s).
The same language is repeated on page 336 RE transmission & final drive/differential.
Also, p. 338 says bushing material is unrestricted.

So, does this language constitute authorization for solid motor/trans/diff mounts?
Oh, and it would be a great idea if SCCA came up with a list of "don'ts" for common questions like this so beginners don't have to go asking questions that have already been settled.

Other thing, while reviewing 2009 GCR, it says "Springs of any origin may be used, provided they are of the same number and type as originally fitted, i.e., coil, leaf, torsion bar, and that they shall be installed in the original location using the original system of attachment." Doesn't this mean that coil-overs are banned for the rear suspension, where a modified MacPherson, i.e. non-coil-over, structure is used?